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Added fat to the ration should PORTABLE & STATIONARY SYSTEMS


be viewed with caution. Johnson and Funston say supplemental fats can increase diet energy density and avoid the negative effects like rumen acidosis sometimes experi- enced with cereal grains in high roughage diets. “Beef animals ap- parently have the ability to store certain fatty acids,” they say, “sup- ported by studies in which fat sup- plementation discontinued at calv- ing resulted in a positive effect on reproduction.” But there appears to be no benefi t, and in some cases there is a negative effect, from feed- ing supplemental fat after calving, especially when it was also fed prior to calving. Patterson says maintaining body


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condition on a younger cow is based on nutrient partitioning. Reproduc- tion is fairly far down on the list of priorities for a young cow with her fi rst calf if her nutrient require- ments are not being met. “She’s still trying to satisfy


her own requirements relative to growth and maintenance plus lacta- tion. That’s the difference between the younger female and the mature female,” Patterson says, adding that the manager of the mature cows is considering cow maintenance and lactation, while the manager of the younger cows with their fi rst calves must manage for the added require- ment for growth.


66 The Cattleman March 2014 thecattlemanmagazine.com


strong expected progeny


differences (EPDs) in key areas.


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